PA6 vs PA66 for Engineering Parts | Comparison
Heat resistance, moisture absorption, mechanical strength — which nylon fits your product?
PA6 and PA66 are the two most commonly used nylons in engineering plastics. They look similar but have significant performance differences. PA66 offers higher heat resistance and strength but costs more and is harder to process; PA6 provides better processability and surface finish. This guide helps you make the optimal choice across cost, performance, and processing dimensions.
Next step: from material choice to inquiry
Move from application guidance to a grade, a formulation, and a clear quote request.
PA6 — Easy Processing, High Cost-Effectiveness
PA66 — High Heat Resistance, High Strength
Quick Comparison
| Property | PA6 — Easy Processing, High Cost-Effectiveness | PA66 — High Heat Resistance, High Strength |
|---|---|---|
| Melting Point | 220-225°C | 255-265°C |
| HDT (1.82 MPa, GF30) | 200-210°C | 250-260°C |
| Water Absorption (23°C/24h) | 1.5-2.0% | 1.0-1.5% |
| Tensile Strength (GF30) | 170-190 MPa | 190-210 MPa |
| Processing Temperature | 230-280°C | 260-300°C |
| Cost | Lower (~$2.3-3.1/kg GF30) | Higher (~$3.1-4.2/kg GF30) |
Test with Real Samples — Let Data Decide
Free 5–10 kg samples + full TDS, response within 24 hours
Recommendation
Recommendation: Choose PA66+GF for high-temperature environments like radiator components and engine bay parts. PA6+GF is sufficient for general parts like power tool housings, casters, and office chair bases — more cost-effective. Automotive cable ties require toughened PA66, while ordinary cable ties can use toughened PA6. Both materials MUST be thoroughly dried (moisture <0.1%) to avoid severe property degradation.
Conclusion
In short: PA66 for heat and strength, PA6 for processability and value. Jinsu supplies the full range of PA6 and PA66 grades (general purpose, glass-fiber reinforced, flame retardant). Free samples and formulation guidance available.
Still torn between two materials?
Send us your drawing or service conditions — our technical team will match the right grade and arrange free sample testing.
Jinsu New Material
WhatsApp: +86 173 5113 2569
sales@maxnmtech.com